Drill-socket.



' NfE. WOODS.

- DRILL SOCKET.

Patented Mar. 5, 1912.

NORMAN E. WOODS, 0F RICHMOND, VIRGINIA.

DRILL-SOCKET.

Specification of Letters Patent.

Patented Mar. 5, 1912.

Application filed October 27, 1911. Serial No. 657,090.

To all whom it may concern:

Be it known that I, NORMAN E. Wooos, of Richmond, in the county ofHenrico and State of Virginia, have invented a certain new and usefulImprovement in Drill-Sockets, of which improvement the following is aspecification.

My invention relates to drill sockets of the class or type having atapered bore for the reception of a correspondingly tapered shank on adrill, an instance of which is exemplified in Letters Patent of theUnited States No. 894,250, granted and issued to me under date of July28, 1908.

The object of my invention is to provide simple and effective means forinsuring the true and accurate bearing of the drill shank in the drillsocket, by preventing its fit in the bore of the latter from beingimpaired by battering or deformation of the drill socket in driving iton the drill press spindle.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawing: Figure 1 is a view, partly in elevation andpartly in longitudinal central section, of a drill socket and part of adrill fitted therein, illustrating the application of my invention, and;Figs. 2 and 3, transverse sections through the same, on the lines a aand b b, respectively, of Fig. 1.

The drill socket herein set forth, corresponds, except as to my presentinvention hereinafter described, with that of Letters Patent No. 894,250aforesaid, having a cylindrical body, 1, provided, with a taperedcentral bore for the reception of the shank of a drill, and a taperedshank, 2, adapted to be fitted in a corresponding bore in a drill pressspindle, in the usual manner. The drill shank, 3, is tapered incorrespondence with the bore of the drill socket, and is provided, atits top, with a tang, 3, of quadrangular section, which fits in a socketof corresponding section, adjacent to the top of the body, '1, of thedrill socket, and pre vents the drill shank from turning therein.

As is well known to those skilled in the art to which my inventionrelates, it frequently happens that the open end of the bore of a drillsocket becomes battered or ammed, around its edge, in driving the drillsocket into position on the spindle of the drill press on which itoperates, from which deformation it results that the drill shank cannotbe driven sufficiently far up into the socket to enable it to bebroughtto a full and true bearing thereon and to obtain the full fit of thetang of the drill shank in its quadrangular seat. In the practice of myinvention, this objection, which is a serious one, is fully overcome bythe provision of a bell mouth or annular recess, 1 which is formed inthe tapered bore of the drill socket, at, and extending outwardly for ashort distance from, its outer end. By reason of the greater result-antdiameter of the outer end of the bore, any deformation of this portionof it which may be made in driving the drill socket on to the drillpress spindle, will be entirely clear of the periphery of the drillshank, and the prejudicial effect of such deformation, on the fit of thedrill shank in the socket, which is exerted in the ordinaryconstruction, will be entirely obviated.

I claim as my invention, and desire to secure by Letters Patent:

A drill socket having a tapered bore for the reception of a drill shank,and a bell mouth or annular recess at and adjoining the outer end ofsaid bore.

NORMAN E. WOODS.

Witnesses:

R. C. DUKE, F. F. RENNIE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

